Engine



Feb. 6, 19

GAINN HAL ENGINE Filed July 22 1942 3 Sheets-Sh 1 E. GINN. ETAL Feb. 6, 1945.

ENGINE Filed July 22, 1942 5 Sheets-Sheet '2 V a 5 Q m INVENTORS Patented Feb. 6, 1945 UNITED STATE PATEN T OFFICE ENGINE Application July 22, 1942, Serial No. 451,830

8 Claims.

to engines and more parsyste'm associated there- This invention relates ticularly to the cooling with.

In internal combustion engines, more particularly heavy duty engines of the inline type. eficient cooling of the engine is an important factor to be considered, as the maximumpower output of such engines is had only when the engine is sufiiciently cooled to efficiently dissipate the heat of the products of combustion.

It is an object of this invention to construct I a heavy duty internal combustion engine of improved construction, by providing a novel cooling system which supplies a coolant to all the engine parts in such a way as to most efficiently dissipate the heat of the productsof combustion and thereby facilitate efficient engine performance.

A further object of this invention is to construct an improved cooling system for heavy duty engines, by providing a coolant distributing manifold structure which uniformly distributes a coolant to the engine and which is more particularly constructed for an engine of the type having a divided cylinder head structure.

A still further object of this invention is to constru-ct an improved cooling system for internalcombustion engines which embody an oil cooler as well by providing a coolant distributing structure which uniformly supplies coolant to all parts of the engine which are to be cooled, andxwhich directly supplies coolant to an oil cooler which is preferably directly attached or secured to the cylinder structure.

For a more detailed understanding of the invention reference may be had to the accompanying drawings illustrating the invention in detail in which like parts throughout the several views areindicated by like reference characters and in which:

Fig. 1 is a side elevational view of an internal combustion engine equipped with an improved coolant distributing manifold,

Fig. 2 is a plan view of the coolant manifold structure, l H" Fig. 3 is a plan sectional'view of the coolant manifold structure,

Fig. 4 is a transverse sectional detail view taken on the line 4 4 of Fig. 3,

Fig. 5 is a transverse sectional detail view taken on the line 5--5 of Fig. 3, and

Fig. 6 is a fragmentary transverse sectional view taken on the line 6-6 of Fig. 1.

The present invention is illustrated preferably as embodied in a heavy duty internal combustion engine H] of the type, having 'a cylinder block H and a divided cylinder head structure comprising front and rear jacketed cylinder head structures I2 and I3, although it will be apparent that the principles of the present invention may be advantageously employed with other types of engines as well. The cylinder head structures l2 and [3 are respectively provided with coolant jackets l2a and l3a while the engine cylinder block H is provided with a coolant jacket I la, said coolant jackets being preferably connected by suitable coolant ports I4 as shown in Figs. 2 and 6.

A coolant manifold structure is constructed for substantially uniformly supplying a coolant to all parts of the engine structure which are to be cooled, and this coolant manifold structure l5 preferably extends longitudinally of the engine 'along side of the cylinder head structures I 2 and I 3. A coolant pump l6 of conventional construc- I tion is preferably secured to the forward part of the engine and preferably supported by v the front cylinder head structure l2 as shown in Fig. 1, said coolant pump being driven in any suitable "manner preferably by means of a driving belt I! decreasing cross-sectional area and is preferably provided with a pair of outlets 2| connected with the cylinder head structure l2 and a pair of outlets 22 connected with the cylinder'head structure l3, these outlets extending laterally anddirectly connected with the cylinder head coolant inlet ports I22) and l3b respectively.

It will thus be observed that the coolant manifold structure thus carries the coolant to both cylinder head structures where same is circulated through the cylinder head jackets l2a and I31: and thence through the cylinder jacket I la, from whence the coolant is returned in the usual manner to the radiator (not shown) connected with said coolant pump inlet. It will be observed that the construction of the coolant conducting runner 20 with progressively decreasing cross-sectional area insures a uniform distribution of the coolant so that the rear cylinder head structure 13 obtains substantially the same amount of coolant at approximately the same pressure as does claims.

the front cylinder head structure 12.

An oil cooler structure 25 is secured by suitable bolts or other fastening devices 26 to the cylinder structure II, and it will be noted that this oil 1 cooler is located in proximity to the coolant manifold structure, and carries a coolant inlet 21 located substantially beneath the coolant manifold 15. Said coolant manifold is provided with a coolant outlet 23 consisting of a downwardly extending elbow 29 directly connected by any suitable water tight connection 30 with the oil cooler inlet connection 21. The engine lubricating oil is circulated through the heat exchange device 3| contained within the oil cooler housing 32, said housing providing a coolant jacket 33 around the heat exchange device 35.

The lubricating oil is fed to the heat exchange device 3| from the lubricating oil duct 34 by reason of the oil cooler inlet passages 35 and 36 and is discharged through the outlet passages 31 and 38 to the oil line or duct 39. A suitable oil filtering device 49 is associated with the oil cooler structure and is operable in the'conventi'onal manner to provide for the required cleaning of the lubricating oil. I The oil coolant jacket 33 is open to the discharge port 45 in the cylinder block, and thus the coolant whichis circulated through the oil cooler is discharged through this outlet port 45 into the cylinder jacket Ila.

It will be observed that the location of the oil cooler which is directly connected with the coolant manifold structure is located to receive a predetermined flow of coolant, and to not disturb:

the uniform distribution of 'thecoolant to the cylinder head structures. The coolant outlet 28 opening into the outlet connection 29 is located intermediate the coolant manifold outlets 22.

It will thus be observed that the above described cooling system provides for a distribution of coolant to all engine parts which are to be cooled to dissipate the heat from the products of combustion, and serves also to distribute a predetermined adequate supply of coolant to an oil cooler structure which is directly connected to the engine by suitable means which directly connect the oil cooler coolant jacket with the coolant' manifold structure.

Although there is illustrated but one preferred form of the invention in the accompanying drawings and described in detail in the accompanying specifications, it will be apparent to those skilled in the art to which this invention pertains that various modifications and changes may be made therein without departing from the spirit of the invention or from the scope of the appended N e claim: g 1. In an internal combustion engine having a coolant jacket and cylinder structure, a liquid cooling system for said engine comprising a liquid coolant manifold having a plurality of longitudinally spaced outlets respectively connected with spaced engine coolant inlets, a jacketed oil cooler connected with the engine lubrication system and carried by said engine, and having coolantinlet and outlet means, and means connecting said oil cooler jacket coolant inlet means to said coolant manifold, the coolant outlet means connected with the cylinder coolant jacket.

2. In an internal combustion engine, a liquid coo-ling system for said engine comprising a liquid coolant manifold extending longitudinally alongside said engine and'having a plurality of longitudinally' spaced outlets respectively connected uid coolant manifold extending longitudinally' alongside said engine and having a plurality of longitudinally spaced outlets respectively connected with engine coolant inlets spaced longitudinally of the engine, a jacketed oil cooler carried on the side of saidengine in proximity to said coolant manifold and having a coolant inlet and outlet, means including a coolant pump for introducing the coolant into one end of said liquid coolant manifold under pressure, the coolant inlet of said oil cooler jacket directly connected withsaid coolantmanifold at a point interme" diate a pair of manifold outlets most distant from the coolant pump.

4. In an inline internal combustion engine having a jacketed cylinder structure, longitudinally aligned, non-interconnected jacketed cylinder head structures secured to the cylinder structure and having coolant outlet ports connected with cylinder coolant inlet ports, a coolant supply system for said engine comprising a liquid coolant manifold extending longitudinally of the engine and secured alongside the cylinder head structures, said coolant manifold having coolant outlet ports respectively openly connected directly to each of the said jacketed cylinder head structures, a jacketed oil cooler secured to the side of the cylinder structure and having coolant inlet and outlet means, and means connecting coolant inlet means of said jacketed oil cooler directly to the coolant manifold and the coolant outlet means directly to the coolant jacket of said cylinder structure.

5. In an inline internal combustion enginehaving a jacketed cylinder structure, longitudinally aligned, non-interconnected jacketed cylinder head structures secured to the cylinder structure and having coolant outlet ports connected with cylinder coolant inlet ports, a coolant supply system for said engine comprising a liquid coolant manifold extending longitudinally of the engine and secured alongside the cylinder head structures, said coolant manifold having coolant outlet ports respectively openly connected'directly to eachof the said jacketed cylinder head structures, a jacketed oil cooler secured directly to the side of the cylinder'structure and located in proximity to the underside of the coolant manifold and having coolant inlet and outlet means, said coolant manifold having a coolant outlet in its underside wall portion, and means directly connecting the aforesaid last mentioned coolant outlet with the coolant inlet means of said oil cooler jacket, the coolantioutlet meansof said jacket portion of the oil cooler directly connected with the coolant jacket of said cylinder structure.

6. In an inline internal combustion engine having a jacketed cylinder structure, longitudinally aligned, non-interconnectedjacketed cylinder head structures secured to the cylinder structure and having coolant outlet ports connected with cylinder coolant inlet ports, a cool ant supply system for said engine comprising a liquid coolant manifold extending longitudinally coolant outlet ports respectively openly connected directly to each of the said jacketed cylinder head structures, a jacketed oil cooler having coolant inlet and outlet means and secured directly to the side of the cylinder structure and located in proximity to the underside of the coolant manifold, said coolant manifold having a coolant outlet in its underside wall portion, and means directly connecting the aforesaid last mentioned coolant outlet with the coolant inlet means of the jacket portion of said oil cooler, the coolant outlet means of said jacket portion of the oil cooler directly connected with the coolant jacket of said cylinder structure, means including a coolant pump for introducing the coolant into one end of said liquid coolant manifold under presing located intermediate the first mentioned manifold outlets most distant from said coolant pump, said first mentioned manifold outlets locsure, the manifold coolant outlet connected with oil cooler coolant inlet means being located intermediate a pair of the manifold outlets connected with the cylinder head structure and disposed most distant from said coolant pump.

'7. In an inline internal combustion engine, having a jacketed cylinder structure, longitudi nally aligned, non-interconnected jacketed cylinder head structures secured to the cylinder structure and having coolant outlet ports connected with cylinder coolant inlet ports, a coolant supply system for said engine comprising a liquid coolant manifold extending longitudinally of the engine and secured alongside the cylinder head structures, said coolant manifold having coolant outlet ports respectively openly connected directly to each of the said jacketed cylinder head structures, a jacketed oil cooler having coolant inlet and outlet means and secured directly to the side of the cylinder structure and located in proximity .to the underside of the coolant manifold, said coolant manifold having a, coolant outlet in it underside wall portion, and means directly connecting the aforesaid last mentioned coolant outlet with the coolant inlet means of said jacket portion of said oil cooler, the-coolant outlet of said jacket portion of the oil cooler directly connected with the jacketed cylinder structure, means including a coolant pump for introducing the coolant into one end of said liquid coolant manifold under pressure, the aforesaid last mentioned coolant outlet connecting with the oil cooler coolant inlet 'being substantially longitudinally aligned and opening laterally on one side only of the coolant manifold in direct registration with the coolant inlet ports carried by the cylinder head structure.

8. In an inline internal combustion engine having a jacketed cylinder structure, longitudinally aligned, non-interconnected jacketed cylinder head structures secured to the cylinder structure and having coolant outlet ports connected with cylinder coolant inlet ports, a coolant supply system for said engine comprising a liquid coolant manifold extending longitudinally of the engine and secured alongside the cylinder head structures, said coolant manifold having coolant outletlports respectively openly connected directly to each of the said jacketed cylinder head structures, a jacketed oil cooler having coolant inlet and outlet means respectively located on the top and rear walls secured directly to the side of the cylinder structure and located in proximity to the underside of the coolant manifold, said coolant manifold having a coolant outlet in its under side Wall portion, and means directly connecting the aforesaid last mentioned coolant outlet with the coolant inlet means of the jacket portion of said oil cooler, the coolant outlet means of said jacket portion of the oil cooler directly connected with the coolant jacket of said cylinder structure, means including a coolant pump for introducing the coolant into one end of said liquid coolant manifold under pressure, the aforesaid last mentioned, coolant outlet connecting with the oil cooler coolant inlet being located intermediate a pair of the first mentioned manifold outlets most distant from aid coolant pump, said first mentioned manifold outlets being substantially longitudinally aligned and opening 1aterally on one side only of the coolant manifold in direct registration with the coolant inlet ports carried by the cylinder head structure, said coolant manifold constructed progressively smaller in cross-sectional area whereby to discharge substantially uniform predetermined quantities of coolant from said manifold outlets.

EARL GINN. H. LESLIE CASSELMAN. 

